If at all, I would definitely go with a free version without questionable additional features. Malwarebytes or Bitdefender free are good candidates. A lot of the paid versions' additional features like call and sms filtering either don't even work on Kitkat and later or they are unnecessary.

let me ask something about rooting a device. I don't mind rooting my mto g I just purchased because in 2months il get the iPhone 6 or a super fast Samsung s5prime or somthin. but in the meantime I may root my device and overclock it. question though is rooting a device will it open it up to virus and malware?

let me ask something about rooting a device. I don't mind rooting my mto g I just purchased because in 2months il get the iPhone 6 or a super fast Samsung s5prime or somthin. but in the meantime I may root my device and overclock it. question though is rooting a device will it open it up to virus and malware?

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Yes. If you ever heard of Linux and root privileges, this is it. If not, then your phone is Limited User Account at the moment, when rooted it is Administrator account.
So yes, it is open to malware infection.

I sometimes use qihoo but find that it uses up the battery and misses some of the tests that CM gets.

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In my experience, and I've used major players, qihoo is the most lowest-impact, lowest battery consuption and most effective at fixing vulnerabilities, junk cleanup and optimization. As for malware, I never got one so I can't comment on that, but with proper usage, the phone can last longer and be more faster.
Using Galaxy S3, CyanogenMod, and Qihoo. Here's a comparison:
1: Stock android, anvil antivirus, or bitdefender, or kaspersky: slow opening, lag, phone conversation lag, battery from 100% to 0%: 17h
2: UltimaRom, qihoo: fast opening, occasional crashes with google playstore services, occasional gui crash, battery lasted for 27 hours
3: Cyanogenmod, qihoo: no crashes, no lag, fast, light, battery lasts for almost 33 hours.
Used Battery Doctor as well but not anymore, even though it helped juice up 1 hour longer, I find that less background programs running, the better...

Yes. If you ever heard of Linux and root privileges, this is it. If not, then your phone is Limited User Account at the moment, when rooted it is Administrator account.
So yes, it is open to malware infection.

In my experience, and I've used major players, qihoo is the most lowest-impact, lowest battery consuption and most effective at fixing vulnerabilities, junk cleanup and optimization. As for malware, I never got one so I can't comment on that, but with proper usage, the phone can last longer and be more faster.
Using Galaxy S3, CyanogenMod, and Qihoo. Here's a comparison:
1: Stock android, anvil antivirus, or bitdefender, or kaspersky: slow opening, lag, phone conversation lag, battery from 100% to 0%: 17h
2: UltimaRom, qihoo: fast opening, occasional crashes with google playstore services, occasional gui crash, battery lasted for 27 hours
3: Cyanogenmod, qihoo: no crashes, no lag, fast, light, battery lasts for almost 33 hours.
Used Battery Doctor as well but not anymore, even though it helped juice up 1 hour longer, I find that less background programs running, the better...

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Qihoo was very low on battery usage for me until the latest update. Then I noticed my battery draining faster than normal. CM Security catches test samples that are missed by Qihoo as well. Qihoo is a good product if you can stand the constant World Cup full screen ads.